The Makita 18V LXT® Lithium-Ion Cordless 1/2” Impact Wrench (model XWT04MB) delivers high torque impact power with a ½” square drive that will fit impact-rated socket sets. It packs plenty of torque for a wide range of fastening and loosening tasks, and is a powerful and convenient substitute for air powered and AC wrenches. The 18V LXT® 4.0Ah battery provides 35% more run time per charge than the 3.0Ah battery (BL1830), yet it charges in only 40 minutes – the fastest charge-time in the category – for less downtime and increased productivity. For added convenience, the battery features an integrated L.E.D. battery charge level indicator. It’s part of Makita’s expanding 18V Lithium-Ion series, the world’s largest cordless tool line-up powered by an 18V Lithium-Ion slide-style battery. Makita 18V Lithium-Ion batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger. For improved tool performance and extended battery life, Makita created Star Protection Computer Controls™. Star Protection is communication technology that allows the Star Protection-equipped tool and battery to exchange data in real time and monitor conditions during use to protect against overloading, over-discharging and overheating. For increased versatility, the tool can also be powered by Makita 18V LXT® and Compact Lithium-Ion batteries with the star symbol on the battery indicating Star Protection inside.